CN109159901B - Variable load energy absorber and protective seat - Google Patents
Variable load energy absorber and protective seat Download PDFInfo
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- CN109159901B CN109159901B CN201810972068.4A CN201810972068A CN109159901B CN 109159901 B CN109159901 B CN 109159901B CN 201810972068 A CN201810972068 A CN 201810972068A CN 109159901 B CN109159901 B CN 109159901B
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 47
- 230000001681 protective effect Effects 0.000 title claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000000306 component Substances 0.000 description 9
- 238000007906 compression Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000004083 survival effect Effects 0.000 description 3
- 208000020339 Spinal injury Diseases 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
- B64D11/0619—Arrangements of seats, or adaptations or details specially adapted for aircraft seats with energy absorbing means specially adapted for mitigating impact loads for passenger seats, e.g. at a crash
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Abstract
The invention relates to the technical field of crash resistance, and discloses a variable load energy absorber and a protective seat. The variable load energy absorber includes an energy absorber member, a cutting assembly, and an adjustment assembly. The surface of the energy absorbing piece is provided with cutting grooves, and the first cutting groove and the second cutting groove are provided with end faces used for being cut. The first tool bit on the retainer can cut the end face of the first cutting groove of the energy absorbing piece when the cutting assembly slides down, so that the energy of falling of the cutting assembly is absorbed. The second cutter head can be selectively pushed to the second cutting groove by the adjusting block, so that the second cutter head can cut the end face of the second cutting groove when the cutting assembly slides along the first preset direction to absorb falling energy. The load absorption capacity of the variable load energy absorber can be adjusted, and the absorption of different loads can be better met. The protective seat comprises the variable load energy absorber and a seat body, and the seat body is connected to the retainer of the cutting assembly, so that the protective requirements of passengers with different weights on falling can be better met.
Description
Technical Field
The invention relates to the technical field of crash resistance, in particular to a variable load energy absorber and a protective seat.
Background
The crash-resistant seat is an important component of helicopter design, is an important device for improving the survival rate of passengers, and the crash-resistant characteristic of the seat directly determines the survival rate of the passengers on the helicopter. The core component of the crash-resistant seat is an energy absorber which limits the load transmitted from the fuselage to the passengers when a crash accident occurs in the helicopter, so as to reduce the casualty rate of the passengers in the crash survival accident. The performance of the energy absorber directly determines the crash resistance of the seat.
Most helicopter seats currently use a fixed load absorber with an approximately constant load-displacement characteristic. This constant load is designed to be the average weight of the seat occupant for maximum effectiveness over the weight range of the seat occupant. This means that lighter occupants experience greater acceleration magnitude than heavier occupants, but heavier occupants have greater displacement (travel). Thus, lighter occupants carry the risk of spinal injury, heavier occupants carry the risk of excessive displacement "bottoming out" despite being subjected to less acceleration, and may also risk spinal injury. Therefore, it is important to provide better protection for passengers with different weights. However, the existing load energy absorber cannot well meet the protection requirements of passengers with different weights.
Disclosure of Invention
The invention aims to provide a variable load energy absorber which has good energy absorption and protection effects when facing different loads.
Another object of the present invention is to provide a protection seat which can better meet the protection requirements of passengers with different weights.
The embodiment of the invention is realized by the following steps:
a variable load energy absorber, comprising:
the energy absorption device comprises an energy absorption piece, a first cutting groove and a second cutting groove are formed in one side surface of the energy absorption piece and extend along a first preset direction, and the first cutting groove and the second cutting groove are provided with end faces used for being cut;
the cutting assembly comprises a retainer sleeved on the energy absorbing piece, a first tool bit, a second tool bit and an adjusting block are arranged on the retainer, the first tool bit is fixed on the retainer and matched with the first cutting groove, and a cutting edge of the first tool bit faces to the end face of the first cutting groove; the second cutter head is connected with the retainer through the resetting component and can move from the working position to the non-working position under the driving of the resetting component, wherein when the second cutter head is positioned at the working position, the second cutter head is matched with the second cutting groove, and the cutting edge of the second cutter head faces the end face of the second cutting groove; when the second cutter head is in the non-working position, the second cutter head is positioned outside the second cutting groove; the holder is provided with an adjusting block mounting hole, the adjusting block is slidably arranged in the adjusting block mounting hole, and the second tool bit can be selectively pushed to the working position from the non-working position when the adjusting block slides along the depth direction of the adjusting block mounting hole; and
and the adjusting component is connected to the adjusting block and is used for adjusting the position of the adjusting block in the adjusting block mounting hole.
In one embodiment of the invention, a first groove and a second groove which extend along a first preset direction are arranged on the inner side of the retainer at intervals, the first cutter head is fixedly connected to the first groove, the second cutter head is movably connected to the second groove, when the second cutter head is in a non-working position, the second cutter head is attached to the bottom of the second groove, and the second cutter head does not extend into the second cutting groove;
the regulating block mounting hole extends along the interval direction of the first groove and the second groove, the regulating block mounting hole is communicated with the bottom of the second groove, and the regulating block can selectively push the second tool bit into the second cutting groove when sliding along the regulating block mounting hole.
In one embodiment of the invention, one end of the adjustment block has a guide slope for pushing the second cutter head.
In one embodiment of the invention, the reset assembly comprises a connecting piece and an elastic piece, the holder is provided with a connecting piece mounting hole, the connecting piece mounting hole penetrates through the inner side and the outer side of the holder, one end of the connecting piece extends into the inner side of the holder from the connecting piece mounting hole and is connected with the second cutter head, the other end of the connecting piece is connected with the holder through the elastic piece, and the elastic piece is used for providing a force towards the outer side of the holder for the connecting piece.
In an embodiment of the present invention, the cutting assembly is further provided with a third cutter head, the energy absorbing member is further provided with a third cutting groove extending along the first preset direction, the third cutting groove is located on the same side of the second cutting groove on the energy absorbing member and is spaced from the second cutting groove, and the third cutting groove has an end face for being cut; the third cutter head is connected with the retainer through the resetting component and can move from the working position to the non-working position under the driving of the resetting component, wherein when the third cutter head is positioned at the working position, the third cutter head is matched with the third cutting groove, and the cutting edge of the third cutter head faces the end face of the third cutting groove; when the third tool bit is in the non-working position, the third tool bit is positioned outside the third cutting groove;
when the adjusting block slides along the depth direction of the adjusting block mounting hole, the third tool bit can be selectively pushed to the working position from the non-working position.
In one embodiment of the invention, the other side surface of the energy absorbing piece is also provided with a first cutting groove and a second cutting groove, and the retainer is correspondingly provided with two first tool bits and two second tool bits.
In one embodiment of the invention, the cage is connected to the energy absorbing member by a shear member for limiting the sliding movement of the cage relative to the energy absorbing member in a first predetermined direction.
In one embodiment of the invention, the adjustment assembly comprises:
the gear block is provided with a sliding clamping groove, and a first jack and a second jack are arranged in the sliding clamping groove;
the pin pulling sliding block is connected with the adjusting block through a rope assembly so as to adjust the position of the adjusting block in the adjusting block mounting hole through the rope assembly; and
a pull pin slidably connected to the pull pin slider, the pull pin configured to be partially insertable into the first receptacle and the second receptacle;
when the pin pulling slide block corresponds to the position of the first jack, the adjusting block cannot push the second cutter head to a working position; when the position of the pin pulling slide block corresponding to the second jack, the adjusting block can push the second cutter head to a working position.
In one embodiment of the invention, the energy absorber further comprises a slip joint slidably connected to the energy absorbing member, the slip joint being capable of sliding relative to the energy absorbing member in a first predetermined direction.
A protective seat comprises a seat body and the variable load energy absorber, wherein the seat body is connected with a retainer.
The embodiment of the invention has the beneficial effects that:
the variable load energy absorber of the embodiments of the present invention includes an energy absorber, a cutting assembly, and an adjustment assembly. The cutting assembly is adapted to carry a load in a first predetermined direction. A first cutting groove and a second cutting groove which extend along a first preset direction are formed in one side surface of the energy absorbing piece, and the first cutting groove and the second cutting groove are provided with end faces used for being cut. The first cutter head and the second cutter head on the retainer are used for being matched with the first cutting groove and the second cutting groove respectively. The first cutter head can cut the end face of the first cutting groove of the energy absorbing piece when the cutting assembly slides down towards the first preset direction, so that the energy of the cutting assembly falling along the first preset direction is absorbed. The second cutter head can be selectively pushed to the second cutting groove by the adjusting block, so that the second cutter head can cut the end face of the second cutting groove when the cutting assembly slides along the first preset direction to absorb falling energy. The second cutter head can be switched between the working position and the non-working position because the adjusting block can be controlled by the adjusting assembly to selectively push the second cutter head. Therefore, the load absorption capacity of the variable load energy absorber can be adjusted, and the absorption of different loads can be better met.
The protective seat comprises the variable load energy absorber and the seat body, and the seat body is connected with the retainer of the cutting assembly, so that the protective requirements of passengers with different weights on falling can be better met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a variable load energy absorber in an embodiment of the invention;
FIG. 2 is a schematic structural view of an energy absorber according to an embodiment of the present invention;
FIG. 3 is a schematic view of a cutting assembly according to an embodiment of the present invention;
FIG. 4 is a schematic view of a cage construction according to an embodiment of the present invention;
FIG. 5 is a schematic view of a tool tip configuration according to an embodiment of the invention;
FIG. 6 is a schematic view of an embodiment of the adjusting block of the present invention;
FIG. 7 is a schematic view of an embodiment of an adjustment assembly of the present invention;
FIG. 8 is a cross-sectional view of an adjustment assembly in an embodiment of the present invention;
FIG. 9 is a schematic view of a shift block configuration in an embodiment of the present invention;
FIG. 10 is a schematic view of a pin puller assembly according to an embodiment of the present invention;
FIG. 11 is a schematic illustration of the operation of a variable load energy absorber in an embodiment of the present invention;
fig. 12 is a schematic structural view of a protection seat 400 according to an embodiment of the present invention.
Icon: 100-variable load energy absorber; 101-an energy absorbing member; 102-a shear; 103-a fixing member; 104-a slip joint; 105-a sliding film; 106-hexagonal head screw; 107-set screws; 200-a cutting assembly; 201-a cage; 202-a bit screw; 203-compression spring; 204 a-first cutting head; 204 b-a second cutting head; 204 c-third cutting head; 205-a conditioning block; 300-an adjustment assembly; 301-gear block; 302-a baffle; 303-a lag screw; 320-a pin pulling assembly; 321-a pin pulling slide block; 322-upper end; 323-pulling pin; 324-a pull ring; 325-spring; 400-a rope assembly; 101 a-first cutting flute; 101 b-a second cutting flute; 101 c-a third cutting flute; 1021-a first shear mounting hole; 1031-fastener mounting holes; 201 a-a first groove; 201 b-a second groove; 201 c-a third groove; 2011-adjustment block mounting holes; 2012-second shear mounting hole; 2013-a connector mounting hole; 2014-binaural joint; 2041-connecting threaded holes; 2042-tool tip rake face; 2051-a first mounting groove; 2052-guide inclined plane; 3011-a slide card slot; 3012-a jack; 3013-tip mounting holes; 3014-a straight-head screw mounting hole; 3212-a second mounting groove; 326-hexagonal boss; 400-a protective seat; 410-seat body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
As shown in FIG. 1, a variable load energy absorber 100 according to an embodiment of the present invention comprises an energy absorber 101, a cutter assembly 200, an adjustment assembly 300, a cable assembly 400, a shear member 102, a fastener 103, and a slip joint 104.
The energy absorbing member 101 has a strip-like rectangular tube structure, and one side of the energy absorbing member 101 has first cutting grooves 101a, second cutting grooves 101b, and third cutting grooves 101c arranged at intervals. The first, second, and third cutting flutes 101a, 101b, and 101c each extend in a first predetermined direction (i.e., direction a shown in the drawings). The three cutting grooves extend from one end of the energy absorbing member 101 to the middle of the energy absorbing member 101 along a first predetermined direction. The first cutting flute 101a, the second cutting flute 101b and the third cutting flute 101c all have end faces at the front end in the first preset direction, and the end faces form an included angle of 45 degrees with the first preset direction, and such end faces form a structure similar to a chamfer so as to reduce the cutting force peak load at the initial stage of cutting. The energy absorber 101 is further provided with a first shear mounting hole 1021 for fixing the shear 102 and a fastener mounting hole 1031 connected to the fastener 103. The end faces of the three cutting flutes are intended to be cut by the tip of cutting assembly 200. In this embodiment, the rectangular energy absorbing member 101 has a first cutting groove 101a, a second cutting groove 101b and a third cutting groove 101c on opposite sides, and the three cutting grooves on the same side are symmetrically arranged with respect to the three cutting grooves on the other side. In the present embodiment, the first cutting flute 101a is deepest, and the second cutting flute 101b and the third cutting flute 101c are shallower with respect to the first cutting flute 101 a. Of course, in other embodiments of the present invention, only the first cutting flutes and the second cutting flutes may be provided, or more cutting flutes may be provided, so that the load-bearing steps are correspondingly reduced or increased to adapt to different loads.
The cutting assembly 200 is connected to the energy absorbing member 101 by a shear member 102, the shear member 102 being adapted to limit the sliding movement of the cage 201 relative to the energy absorbing member 101 in a first predetermined direction. Only when the load applied to the holder 201 in the first predetermined direction exceeds a predetermined value such that the shearing member 102 is broken, the cutting assembly 200 starts to cut the energy absorbing member 101 for the purpose of absorbing the load. The fixed piece 103 is connected with the upper end and the lower end of the energy-absorbing piece 101 through a hexagon head screw 106 and a nut, a hole position connected with the side wall of the engine room is arranged on the fixed piece 103, and the energy-absorbing piece 101 and the fixed piece 103 form a fixed part of the variable load energy absorber 100. The slip joint 104 provides ears for attachment to a seat to increase stability of the cutting assembly 200 during cutting during energy absorption. The sliding film 105 is installed between the energy absorbing member 101 and the sliding joint 104, and is fixed by a set screw 107, and the sliding joint 104 plays a role in guiding during energy absorption. The adjustment assembly 300 is mounted to the seat and is coupled to the cutting assembly 200 by a cable assembly 400.
As shown in fig. 2 to 6, the cutting assembly 200 includes a holder 201, a bit screw 202, a compression spring 203, a bit, and an adjustment block 205. The retainer 201 is sleeved at one end of the energy absorbing part 101, and a groove, a regulating block mounting hole 2011, a second shearing part mounting hole 2012, a connecting part mounting hole 2013 and a double-lug joint 2014 are arranged on the inner side of the retainer 201; the tool bit is a hard alloy tool and is provided with a connecting threaded hole 2041 and a tool bit rake surface 2042; the adjusting block 205 is provided with a first mounting groove 2051 for mounting the ball head of the rope assembly 400 and a guide inclined surface 2052, so that the adjusting block 205 can jack up the tool bit.
In the present embodiment, the tool bits are divided into a first tool bit 204a, a second tool bit 204b, and a third tool bit 204 c. The grooves include two first grooves 201a, two second grooves 201b, and two third grooves 201c for mounting a first bit 204a, a second bit 204b, and a third bit 204c, respectively. The second cutting head 204b and the third cutting head 204c are respectively connected with the holder 201 through a reset component, and the second cutting head 204b and the third cutting head 204c can move from the working position to the non-working position under the action of the reset component. When the second cutter head 204b and the third cutter head 204c are in the working positions, the second cutter head 204b and the third cutter head 204c are respectively matched with the second cutting groove 101b and the third cutting groove 101c, and the cutting edges of the second cutter head and the third cutter head face the end faces of the second cutting groove 101b and the third cutting groove 101 c; when the second and third tool tips 204b and 204c are in the rest position, they are located outside the second and third cutting flutes 101b and 101 c; the adjustment block 205 is slidably disposed in the adjustment block mounting hole 2011, and when the adjustment block 205 slides along the depth direction of the adjustment block mounting hole 2011, the second tool bit 204b and the third tool bit 204c can be selectively pushed from the non-working position to the working position.
In this embodiment, the reset assembly includes a connecting member and an elastic member, the holder 201 is provided with a connecting member mounting hole 2013, the connecting member mounting hole 2013 penetrates through the inner side and the outer side of the holder 201, one end of the connecting member extends into the holder 201 from the connecting member mounting hole 2013 and is connected with the second tool bit 204b, the other end of the connecting member is connected with the holder 201 through the elastic member, and the elastic member is used for providing a force towards the outer side of the holder 201 for the connecting member. In this embodiment, the connector can also be a bit screw 202 that is threaded through the connector receiving hole 2013 and the resilient member can be a compression spring 203. Similarly, the third cutting head 204c is connected to the third groove 201c through the reset assembly in the same manner.
In the present embodiment, the adjustment block 205 is mounted in the adjustment block mounting hole 2011, and the ball of the cord assembly 400 is inserted in the first mounting groove 2051 of the adjustment block 205. A first bit 204a is attached in the first groove 201a by a bit screw 202 and contacts the bottom surface of the first groove 201 a. The first cutting head 204a of this embodiment is secured in the first recess 201a and remains in an operative position, i.e. capable of cutting the end surface of the first cutting flute 101a when the cutting assembly 200 is moved in the first predetermined direction.
When the gear is in the 1-gear position, the connecting piece is bounced outwards under the action of the compression spring 203, the second cutter head 204b and the third cutter head 204c are driven to move to the non-working positions, the bottom surfaces of the second cutter head 204b and the third cutter head 204c are respectively contacted with the bottom surfaces of the second groove 201b and the third groove 201c, the second cutter head 204b and the third cutter head 204c do not participate in cutting, only the first cutter head 204a participates in cutting, and the provided cutting force meets the energy absorption requirement of small load. When the gear is adjusted to the 2-gear, the adjusting assembly 300 pulls the adjusting block 205 through the rope assembly 400 to jack the second cutter head 204b into the second cutting groove 101b of the energy absorbing piece 101, and at the moment, the first cutter head 204a and the second cutter head 204b participate in cutting together, so that the provided cutting force meets the energy absorbing requirement of higher load; when the gear is in the 3-gear position, the adjusting assembly 300 continuously pulls the adjusting block 205 through the rope assembly 400, at the moment, the adjusting block 205 further pushes the second cutter head 204b and the third cutter head 204c into the second cutting groove 101b and the third cutting groove 101c at the same time, the three pairs of cutter heads participate in cutting, the cutting force is the largest, and the energy absorption requirement of the highest load is met.
In the present embodiment, the 1 st gear, the 2 nd gear, and the 3 rd gear may be provided to correspond to a 5 th percentile passenger, a 50 th percentile passenger, and a 95 th percentile passenger, respectively, satisfying the body weight.
As shown in fig. 7 to 10, the adjusting assembly 300 includes a gear block 301, a baffle plate 302, a horizontal head screw 303, and a pin pulling assembly 320; the gear block 301 is provided with a sliding slot 3011 for the pin pulling slider 321 to slide, an insertion hole 3012 for the pin pulling 323 to insert, a horizontal head screw mounting hole 3014, and a head mounting hole 3013 of the rope assembly 400. The pin pulling assembly 320 comprises a pin pulling slider 321, an upper end head 322, a pin pulling 323, a pulling ring 324, a spring 325 and a hexagonal boss 326; the pin pulling slide block 321 is in a square boss shape, and in the sliding clamp slot 3011, the pin pulling slide block 321 is provided with a second mounting groove 3212 for mounting a ball head at the other end of the rope assembly 400, and the hexagonal boss 326 is in contact with the upper end face of the gear block 301. The jack 3012 for the plug pin 323 to insert is divided into a first jack, a second jack and a third jack, the three jacks 3012 are arranged at intervals in the extending direction of the sliding slot 3011, and the three jacks correspond to 1 block, 2 blocks and 3 blocks respectively. When the gear needs to be adjusted, the pull ring 324 is pulled, the pull pin 323 is pulled outwards, the pull pin assembly 320 is slid to a corresponding gear, and the pull pin assembly 320 drives the adjusting block 205 through the rope assembly 400 to jack the corresponding cutter head into the cutting groove; the pull ring 324 is then released and the pull pin 323 is inserted into the socket 3012 under the action of the spring 325. The stop plate 302 is fixed to one end of the stop block 301 by a cap screw 303 to limit the sliding out of the pin pulling assembly 320.
Fig. 11 shows the working condition of the energy absorbing member 101 being cut when the three pairs of cutter heads of the variable load energy absorber 100 of the present invention are all involved in cutting, when the load applied to the retainer 201 along the first predetermined direction reaches the set impact load value, the shearing member 102 is sheared, and the energy absorbing member 101 is cut into strip-shaped chips by the cutting assembly 200 to absorb the impact energy.
Fig. 12 is a schematic structural view of a protection seat 400 according to an embodiment of the present invention. Referring to fig. 12, the protection seat 400 provided by the embodiment includes the variable load energy absorber 100 of the embodiment and a seat body 410, and the seat body 410 is connected to two ears of the retainer 201 (see fig. 3) and the sliding joint 104 (see fig. 1). In use of the safety seat 400 (e.g., when the safety seat 400 is used on an aircraft), the variable load energy absorber 100 may be secured to the cabin wall by fasteners 103. When the vehicle falls in an emergency, the variable load energy absorber 100 can absorb the impact energy of the fall, thereby protecting the safety of the human body. The protection seat provided by the embodiment of the invention has three selectable gears, so that the protection requirements of passengers with different weights can be met.
In summary, the variable load energy absorber of the present invention comprises an energy absorbing member, a cutting assembly, and an adjustment assembly. The cutting assembly is adapted to carry a load in a first predetermined direction. A first cutting groove and a second cutting groove which extend along a first preset direction are formed in one side surface of the energy absorbing piece, and the first cutting groove and the second cutting groove are provided with end faces used for being cut. The first cutter head and the second cutter head on the retainer are used for being matched with the first cutting groove and the second cutting groove respectively. The first cutter head can cut the end face of the first cutting groove of the energy absorbing piece when the cutting assembly slides down towards the first preset direction, so that the energy of the cutting assembly falling along the first preset direction is absorbed. The second cutter head can be selectively pushed to the second cutting groove by the adjusting block, so that the second cutter head can cut the end face of the second cutting groove when the cutting assembly slides along the first preset direction to absorb falling energy. The second cutter head can be switched between the working position and the non-working position because the adjusting block can be controlled by the adjusting assembly to selectively push the second cutter head. Therefore, the load absorption capacity of the variable load energy absorber can be adjusted, and the absorption of different loads can be better met.
The protective seat comprises the variable load energy absorber and the seat body, and the seat body is connected with the retainer of the cutting assembly, so that the protective requirements of passengers with different weights on falling can be better met.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A variable load energy absorber, comprising:
the energy absorption device comprises an energy absorption piece, a first cutting groove and a second cutting groove are formed in one side surface of the energy absorption piece, the first cutting groove and the second cutting groove extend along a first preset direction, and both the first cutting groove and the second cutting groove are provided with end faces for being cut;
the cutting assembly comprises a retainer sleeved on the energy absorbing piece, a first cutter head, a second cutter head and an adjusting block are arranged on the retainer, the first cutter head is fixed on the retainer and matched with the first cutting groove, and a cutting edge of the first cutter head faces to the end face of the first cutting groove; the second cutter head is connected with the retainer through a resetting component and can move from a working position to a non-working position under the driving of the resetting component, wherein when the second cutter head is positioned at the working position, the second cutter head is matched with the second cutting groove, and the cutting edge of the second cutter head faces the end face of the second cutting groove; when the second cutter head is in the non-working position, the second cutter head is positioned outside the second cutting groove; the holder is provided with an adjusting block mounting hole, the adjusting block is slidably arranged in the adjusting block mounting hole, and the adjusting block can selectively push the second tool bit from the non-working position to the working position when sliding along the depth direction of the adjusting block mounting hole; and
and the adjusting component is connected to the adjusting block and is used for adjusting the position of the adjusting block in the adjusting block mounting hole.
2. The variable load energy absorber as claimed in claim 1, wherein a first groove and a second groove extending along the first predetermined direction are formed at intervals on the inner side of the retainer, the first cutter head is fixedly connected to the first groove, the second cutter head is movably connected to the second groove, when the second cutter head is in the non-working position, the second cutter head is attached to the bottom of the second groove, and the second cutter head does not extend into the second cutting groove;
the regulating block mounting hole is followed first recess with the interval direction of second recess extends, the regulating block mounting hole with second recess bottom intercommunication, the regulating block is following selectively will when the regulating block mounting hole slides the second tool bit push to in the second cutting groove.
3. The energy absorber of claim 2 wherein said adjustment block has a guide ramp at one end for urging said second head.
4. The variable load energy absorber as claimed in claim 1, wherein the return assembly comprises a connecting member and an elastic member, the retainer is provided with a connecting member mounting hole, the connecting member mounting hole penetrates through the inner side and the outer side of the retainer, one end of the connecting member extends into the inner side of the retainer from the connecting member mounting hole and is connected with the second cutter head, the other end of the connecting member is connected with the retainer through the elastic member, and the elastic member is used for providing a force towards the outer side of the retainer for the connecting member.
5. A variable load energy absorber according to claim 1 wherein said cutting assembly is further provided with a third cutting head, said energy absorber member is further provided with a third cutting flute extending in said first predetermined direction, said third cutting flute is spaced from and located on the same side of said second cutting flute on said energy absorber member, said third cutting flute has an end face for being cut; the third cutter head is connected with the retainer through a resetting component and can move from a working position to a non-working position under the driving of the resetting component, wherein when the third cutter head is positioned at the working position, the third cutter head is matched with the third cutting groove, and the cutting edge of the third cutter head faces the end face of the third cutting groove; when the third cutting head is in the inactive position, the third cutting head is positioned outside the third cutting flute;
when the adjusting block slides along the depth direction of the adjusting block mounting hole, the third cutter head can be selectively pushed to the working position from the non-working position.
6. The variable load energy absorber according to claim 1, wherein the other side surface of the energy absorbing member is also provided with the first cutting groove and the second cutting groove, and the surface of the retainer corresponding to the two sides of the energy absorbing member is provided with two first tool bits and two second tool bits.
7. A varying load energy absorber according to any of claims 1-6 wherein said cage is connected to said energy absorbing member by shear members, said shear members being adapted to limit sliding of said cage relative to said energy absorbing member in said first predetermined direction.
8. A variable load energy absorber according to any of claims 1-6 wherein said adjustment assembly comprises:
the gear block is provided with a sliding clamping groove, and a first jack and a second jack are arranged in the sliding clamping groove;
the pin pulling sliding block is connected with the adjusting block through a rope assembly so as to adjust the position of the adjusting block in the adjusting block mounting hole through the rope assembly; and
a pull pin slidably connected to the pull pin slider, the pull pin configured to be partially insertable into the first receptacle and the second receptacle;
when the pin pulling slide block corresponds to the position of the first jack, the adjusting block cannot push the second cutter head to the working position; when the pin pulling slide block corresponds to the position of the second jack, the adjusting block can push the second cutter head to the working position.
9. A varying energy absorber according to any of claims 1-6 further comprising a slip joint slidably connected to said energy absorbing member, said slip joint being slidable relative to said energy absorbing member in said first predetermined direction.
10. A protective seat comprising a seat body and a varying load energy absorber as claimed in any one of claims 1 to 9, the seat body being connected to the cage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972068.4A CN109159901B (en) | 2018-08-24 | 2018-08-24 | Variable load energy absorber and protective seat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810972068.4A CN109159901B (en) | 2018-08-24 | 2018-08-24 | Variable load energy absorber and protective seat |
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| Publication Number | Publication Date |
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| CN109159901A CN109159901A (en) | 2019-01-08 |
| CN109159901B true CN109159901B (en) | 2020-06-26 |
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| CN201810972068.4A Active CN109159901B (en) | 2018-08-24 | 2018-08-24 | Variable load energy absorber and protective seat |
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| CN112224420B (en) * | 2020-10-14 | 2023-12-05 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204452945U (en) * | 2015-02-07 | 2015-07-08 | 江苏中陆航星航空工业有限公司 | A kind of energy absorbing formula aircraft seat |
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| US7822522B2 (en) * | 2006-05-31 | 2010-10-26 | Techno-Sciences, Inc. (corporation) | Adaptive energy absorption system for a vehicle seat |
| CN201520235U (en) * | 2009-10-17 | 2010-07-07 | 周正 | Adjustable lightning protection damping seat |
| CA2706298A1 (en) * | 2010-06-01 | 2011-12-01 | Allen-Vanguard Corporation | Improved vehicle seat |
| CN204587312U (en) * | 2015-02-03 | 2015-08-26 | 北京安达维尔航空设备有限公司 | A kind of energy absorber variable load control mechanism |
| RU2611326C1 (en) * | 2016-03-10 | 2017-02-21 | Открытое акционерное общество "Научно-производственное предприятие "Звезда" имени академика Г.И. Северина" | Energy-absorbing seat for aircraft |
| US9963234B2 (en) * | 2016-07-14 | 2018-05-08 | Ami Industries, Inc. | Energy absorbing assembly for aircraft seat |
| CN107284304A (en) * | 2017-07-20 | 2017-10-24 | 重庆执耳科技有限公司 | A kind of energy-absorbing lightning protection seat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204452945U (en) * | 2015-02-07 | 2015-07-08 | 江苏中陆航星航空工业有限公司 | A kind of energy absorbing formula aircraft seat |
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